<!DOCTYPE html>
<html>

<head>
    <meta charset="utf-8">
    <title>a15_SubmitForm</title>
    <script src="https://localhost/script/jquery-3.5.1.js"></script>
    <script src="https://localhost/script/jquery-ui-1.12.1/jquery-ui.js"></script>
</head>

<body>
你喜欢的宠物是: <?php echo($_GET["pet"])?>.
<hr/>
$_GET dump:  <?php var_dump($_GET); ?>
</body>

</html>